Botanical Gardens are the major places where people collect, cultivate, preserve and display all kinds of plants. They have made important contributions to human civilization and economic and social development during the past 500 years. To provide more intuitive understanding of plants cultivated ex situ in botanical gardens, Encyclopedia of China Garden Flora will be published in series with brief description of plants cultivated ex situ and color photos in alphabetical order by the Latin families. All plants in each volume are also arranged in alphabetical order. Chinese and Latin names, identification, color photographs and locations of living plants in China's major botanical gardens for ex situ conservation are included in the book. Chinese name and Latin name of all plants are indexed at the end of each volume for reference. Encyclopedia of China Garden Flora (Vol. I) collected a total of 1008 plant species from 228 genera and 15 families that were cultivated ex situ in major botanical gardens in China, along with 687 color photographs.